Vitaemancy

Upon collecting the necessary components, upon touching a willing creature and applying an object to the missing spot, spend 1 action on recreating the missing biology and connecting it permanently to the creature. Radiant energy flows from your grasp and transfers on the spot, where the object turned to bilogical piece (teeth; finger;hand;foot) is connected.  The creature gains temporary Hit points equal to your spell casting modifier until the end of it's next round.

An unwilling creature may roll a Constitution save to try and force away the effects of the spell, should it be used for malicious intents (creating hands to prevent vision; feet to obstruct movement, etc)

At Higher Levels: When cast at 5th up to 7th level, you can apply bigger pieces to recreate more complex functioning biology (full limbs; lungs; liver; heart; eyes, etc). Additionally, if the creature is already in tact, when casting as a ritual, you can temporarily apply further biological pieces, giving them bonuses to Dex checks an saves for 1 hour. Additionally, when Vitalitation piles on limbs, for every set, the target gains an extra attack they can apply on their turn, for 1 hour.